1. Date of download: 9/18/2016 Copyright © The American College of Cardiology. All rights reserved. From: U.S. Hospital Use of Echocardiography: Insights From the Nationwide Inpatient Sample J Am Coll Cardiol. 2016;67(5):502-511. doi:10.1016/j.jacc.2015.10.090 Figure Legend: U.S. Hospital Trends in Echo Use: 2001 to 2011 (A) Annual national volume (shaded area) and incidence (dashed line) of echocardiography (echo) use per hospitalization. (B) Average charge of hospitalization in which echo was coded as the principal procedure performed versus the national average. (C) Average length of hospitalization in which echo was coded as the principal procedure performed versus the national average. (D) Incidence of inpatient mortality of hospitalizations in which echo was coded as the principal procedure performed versus the national average. LOS = length of stay.

2. Date of download: 9/18/2016 Copyright © The American College of Cardiology. All rights reserved. From: U.S. Hospital Use of Echocardiography: Insights From the Nationwide Inpatient Sample J Am Coll Cardiol. 2016;67(5):502-511. doi:10.1016/j.jacc.2015.10.090 Figure Legend: Echo Use per 100,000 Hospitalizations by State, 2010 The highest inpatient echocardiography (echo) use was seen in Rhode Island, New York, and Montana, whereas the lowest rates were observed in Wyoming, Alaska, and New Mexico.

3. Date of download: 9/18/2016 Copyright © The American College of Cardiology. All rights reserved. From: U.S. Hospital Use of Echocardiography: Insights From the Nationwide Inpatient Sample J Am Coll Cardiol. 2016;67(5):502-511. doi:10.1016/j.jacc.2015.10.090 Figure Legend: Sample Rates of Diagnostic Cardiac Catheterization and Echo by Admission Diagnosis AMI = acute myocardial infarction; CAD = coronary artery disease; Cath = cardiac catheterization; CHF = congestive heart failure; Echo = echocardiography.

4. Date of download: 9/18/2016 Copyright © The American College of Cardiology. All rights reserved. From: U.S. Hospital Use of Echocardiography: Insights From the Nationwide Inpatient Sample J Am Coll Cardiol. 2016;67(5):502-511. doi:10.1016/j.jacc.2015.10.090 Figure Legend: Adjusted Odds Ratio (95% CI) of In-Hospital Death in Patients Who Underwent Echo by CCS Admission Diagnosis Results control for age, sex, race, insurance, income quartile by zip code, number of chronic diseases, All Patient Refined–Diagnosis Related Group (APR-DRG) severity index, administration of cardiac catheterization and/or cardiac stress test, and admission day. Cath = coronary catheterization; CCS = Clinical Classification Software (codes); CI = confidence interval; other abbreviations as in Figure 2.